EP1368920A4 - Maintaining a global time reference among a group of networked devices - Google Patents

Maintaining a global time reference among a group of networked devices

Info

Publication number
EP1368920A4
EP1368920A4 EP02728428A EP02728428A EP1368920A4 EP 1368920 A4 EP1368920 A4 EP 1368920A4 EP 02728428 A EP02728428 A EP 02728428A EP 02728428 A EP02728428 A EP 02728428A EP 1368920 A4 EP1368920 A4 EP 1368920A4
Authority
EP
European Patent Office
Prior art keywords
maintaining
group
time reference
networked devices
global time
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02728428A
Other languages
German (de)
French (fr)
Other versions
EP1368920A1 (en
Inventor
James L Taylor
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pulse Link Inc
Original Assignee
Pulse Link Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pulse Link Inc filed Critical Pulse Link Inc
Publication of EP1368920A1 publication Critical patent/EP1368920A1/en
Publication of EP1368920A4 publication Critical patent/EP1368920A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
    • H04N21/4305—Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/062—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers
    • H04J3/0632—Synchronisation of packets and cells, e.g. transmission of voice via a packet network, circuit emulation service [CES]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/43615—Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H04J3/0641—Change of the master or reference, e.g. take-over or failure of the master
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L2007/047—Speed or phase control by synchronisation signals using special codes as synchronising signal using a sine signal or unmodulated carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices
EP02728428A 2001-03-13 2002-03-07 Maintaining a global time reference among a group of networked devices Withdrawn EP1368920A4 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US805735 2001-03-13
US09/805,735 US7035246B2 (en) 2001-03-13 2001-03-13 Maintaining a global time reference among a group of networked devices
PCT/US2002/007082 WO2002073851A1 (en) 2001-03-13 2002-03-07 Maintaining a global time reference among a group of networked devices

Publications (2)

Publication Number Publication Date
EP1368920A1 EP1368920A1 (en) 2003-12-10
EP1368920A4 true EP1368920A4 (en) 2005-12-21

Family

ID=25192373

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02728428A Withdrawn EP1368920A4 (en) 2001-03-13 2002-03-07 Maintaining a global time reference among a group of networked devices

Country Status (7)

Country Link
US (1) US7035246B2 (en)
EP (1) EP1368920A4 (en)
JP (1) JP2004535696A (en)
CN (1) CN1561589A (en)
AU (1) AU2002258481B2 (en)
CA (1) CA2438569A1 (en)
WO (1) WO2002073851A1 (en)

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CN1561589A (en) 2005-01-05
WO2002073851A1 (en) 2002-09-19
EP1368920A1 (en) 2003-12-10
US20020131398A1 (en) 2002-09-19
CA2438569A1 (en) 2002-09-19
JP2004535696A (en) 2004-11-25
US7035246B2 (en) 2006-04-25
AU2002258481B2 (en) 2007-09-20

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